US5436880A - Laser power control in an optical recording system using partial correction of reflected signal error - Google Patents
Laser power control in an optical recording system using partial correction of reflected signal error Download PDFInfo
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- US5436880A US5436880A US08/179,476 US17947694A US5436880A US 5436880 A US5436880 A US 5436880A US 17947694 A US17947694 A US 17947694A US 5436880 A US5436880 A US 5436880A
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- signal
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
- G11B7/125—Optical beam sources therefor, e.g. laser control circuitry specially adapted for optical storage devices; Modulators, e.g. means for controlling the size or intensity of optical spots or optical traces
- G11B7/126—Circuits, methods or arrangements for laser control or stabilisation
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- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Recording Or Reproduction (AREA)
Abstract
Description
G=G1×G2.
MFE.sub.c =MFE.sub.o /(1+G)
P.sub.D =P.sub.R +(K×V.sub.DAC),
P.sub.MFE =K×V.sub.MFE ×G.sub.MFE,
Vp(t)=Y.sub.1 +Y.sub.2 (exp(-(t-T)/X)).
((V.sub.1 /V.sub.2)-1)/((V.sub.1 /V.sub.2)+1)
______________________________________ Parts List ______________________________________ 10 optical head 11 optical source 14 optical medium 19 optical detector 23 MFE signal generator 27 pulse generator 28 data source 30 front facet monitor (FFM) 32 recording system processor 34 signal combiner 36 recording system memory 40 voltage limiter 50 servo loop feedback circuit 60 variable gain stage 62 fixed gain stage 64 loop switch 66 write power DAC 68 signal combiner 70 write laser driver 72 read power DAC 74 read laser driver 91 first amplifier 92 error signal input 94 second amplifier 96 voltage limit input 100 first transistor 101 negative voltage reference 102 second transistor 106 first resistor 110 second resistor 112 positive voltage reference 120 third amplifier 130 incident write pulse 131 write power level 132 write signal intervals 133 lower power level 134 high reflectivity value 135 low reflectivity value 140 incident write pulse rising edge 142 reflected write pulse 143 reflected write pulse rising edge 144 reflected write pulse peak voltage 146 reflected write pulse plateau voltage 150 reflected write signal input 152 first level detector 154 second level detector 156 reference pulse input 158 reference pulse input 160 normalizer circuit 162 normalizer circuit output A, B, C, D reflected write pulses a, b, c, d MFE signals A.sub.+ positive readback peak voltage A.sub.-- negative readback mark voltage FFM.sub.H first FFM voltage FFM.sub.L second FFM voltage G total open loop gain G1 media response G2 variable gain 1/(1 + G) residual error G.sub.MFE MFE servo loop gain K laser voltage-power characteristic MFE.sub.C closed loop MFE error MFE.sub.O open loop MFE error P power P.sub.I (t) incident optical write signal P.sub.A available laser output power P.sub.D actual laser output power P.sub.H first laser output power P.sub.L second laser output power P.sub.M maximum laser output power P.sub.MFE MFE servo loop power P.sub.R read power P.sub.RB (t) read back signal R reflectivity R(t) reflectivity waveform t,T time T.sub.N measurement time V.sub.1, V.sub.1a, V.sub.1b, first reflected pulse voltage V.sub.1c, V.sub.1d V.sub.2, V.sub.2a, V.sub.2b, second reflected pulse voltage V.sub.2a, V.sub.2d V.sub.DAC variable DAC control voltage V.sub.DB minimum deadband voltage V.sub.DH first DAC voltage V.sub.DL second DAC voltage V.sub.L MFE error signal voltage limit V.sub.P (t) reflected pulse voltage V.sub.R (t) reflected write signal X exponential function constant Y.sub.1 plateau voltage Y.sub.2 peak to plateau voltage difference β readback signal beta ΔT.sub.1 first predetermined time ΔT.sub.2 second predetermined time ______________________________________
Claims (20)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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US08/179,476 US5436880A (en) | 1994-01-10 | 1994-01-10 | Laser power control in an optical recording system using partial correction of reflected signal error |
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Application Number | Priority Date | Filing Date | Title |
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US08/179,476 US5436880A (en) | 1994-01-10 | 1994-01-10 | Laser power control in an optical recording system using partial correction of reflected signal error |
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US5436880A true US5436880A (en) | 1995-07-25 |
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US08/179,476 Expired - Lifetime US5436880A (en) | 1994-01-10 | 1994-01-10 | Laser power control in an optical recording system using partial correction of reflected signal error |
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US5625616A (en) * | 1995-04-05 | 1997-04-29 | Sony Corporation | Deterioration estimating method for a light emitting device and a light emission driving apparatus using the method |
US5640381A (en) * | 1996-03-08 | 1997-06-17 | International Business Machines Corporation | Laser power-drive circuit having a scaling DAC supplying a scaled reference signal to a plurality of scaled DAC's that supply a plurality of scaled output signals |
US5646919A (en) * | 1996-01-16 | 1997-07-08 | Eastman Kodak Company | Dynamic tracking control in an optical recording system by sensing mark formation |
US5675568A (en) * | 1996-01-16 | 1997-10-07 | Eastman Kodak Company | Laser power control in an optical recording system to compensate for variations in mark length resulting from a wobbled groove |
US5726965A (en) * | 1996-02-29 | 1998-03-10 | Eastman Kodak Company | Intersymbol interference detection in an optical recording system using a reflected write signal |
US5742046A (en) * | 1996-10-18 | 1998-04-21 | Eastman Kodak Company | Amplifier circuit for providing outputs as a function of sensed light |
US5856964A (en) * | 1997-04-15 | 1999-01-05 | Eastman Kodak Company | Multihead optical disc drives with direct reading after writing operation |
US5903537A (en) * | 1997-04-07 | 1999-05-11 | Eastman Kodak Company | Direct read during mark formation for laser power correction |
US5978334A (en) * | 1997-10-24 | 1999-11-02 | Eastman Kodak Company | Sampling timing for a reflected write signal |
US6046970A (en) * | 1998-02-13 | 2000-04-04 | International Business Machines Corporation | System for creating, reading and writing on rotatable storage media, an apparatus for determining laser aging characteristics |
US6049512A (en) * | 1998-02-13 | 2000-04-11 | International Business Machines Corporation | In a system for creating, reading and writing on rotatable information storage media, an apparatus for two-sided writing |
US6081487A (en) * | 1998-02-13 | 2000-06-27 | International Business Machines Corporation | System for creating, reading and writing on rotatable information storage media, an apparatus for controlling laser positioning |
US6088308A (en) * | 1998-02-13 | 2000-07-11 | International Business Machines Corporation | System for creating, reading and writing on rotatable information storage media, a tracking circuit for providing positioning information |
US6088306A (en) * | 1998-02-13 | 2000-07-11 | International Business Machines Corporation | System for creating, reading and writing on rotatable information storage media, an apparatus for combined writing and reading operations |
US6088309A (en) * | 1998-02-13 | 2000-07-11 | International Business Machines Corporation | System for creating, reading and writing on rotatable information storage media, a method for controlling vertical laser alignment |
US6097681A (en) * | 1998-02-13 | 2000-08-01 | International Business Machines Corporation | System for creating, reading and writing on rotatable information storage media, an apparatus for determining angular position, θ |
US6097677A (en) * | 1998-02-13 | 2000-08-01 | International Business Machines Corporation | System for creating, reading and writing on rotatable information storage media, a method for combined writing and reading operations |
US6108282A (en) * | 1998-02-13 | 2000-08-22 | International Business Machines Corporation | System for creating, reading and writing on rotatable information storage media, an apparatus for multilayer laser source positioning |
US6111830A (en) * | 1998-02-13 | 2000-08-29 | International Business Machines Corporation | System for creating, reading and writing on rotatable information storage media, an apparatus for determining linear and/or angular velocity |
US6118740A (en) * | 1998-02-13 | 2000-09-12 | International Business Machines Corporation | System for creating, reading and writing on rotatable information storage media, a method for writing closely spaced information tracks |
US6128262A (en) * | 1998-02-13 | 2000-10-03 | International Business Machines Corporation | System for creating, reading and writing on rotatable information storage media, a method for customizing said media with timing information |
US6222813B1 (en) | 1998-02-13 | 2001-04-24 | International Business Machines Corporation | System for creating, reading and writing on rotatable information storage media, an apparatus for controlling vertical laser alignment |
US6232045B1 (en) | 1998-02-13 | 2001-05-15 | International Business Machines Corporation | System for creating, reading and writing on rotatable information storage media, a method for producing a recording blank |
EP1109161A1 (en) * | 1998-08-20 | 2001-06-20 | Matsushita Electric Industrial Co., Ltd. | Laser power controller and optical disk device |
US6285639B1 (en) * | 1998-04-29 | 2001-09-04 | Sony Corporation | On-the-fly of jitter during optical disc mastering/recording |
EP1191520A2 (en) * | 2000-09-26 | 2002-03-27 | Pioneer Corporation | Information record apparatus, information record method, and information record medium |
EP1197959A2 (en) * | 2000-09-26 | 2002-04-17 | Pioneer Corporation | Information recording apparatus, information recording method, and information recording medium |
US20020044507A1 (en) * | 2000-08-10 | 2002-04-18 | Kei Hagiwara | Optical disk device recording data on a recordable or rewritable optical disk by setting a recording velocity and a recording power for each of zones on an optical disk |
US20020071366A1 (en) * | 2000-09-25 | 2002-06-13 | Kenji Nagashima | Optical recording apparatus, and a method for controlling laser power therein |
US6407976B2 (en) | 1997-04-11 | 2002-06-18 | Sony Coproration | Method for controlling laser light power, method for data recording into optical disc, and optical disc recording apparatus |
EP1343151A1 (en) * | 2000-12-06 | 2003-09-10 | Sony Corporation | Recording apparatus and recording method |
US20030185127A1 (en) * | 2002-03-29 | 2003-10-02 | Media Tek Inc. | Method and apparatus for controlling laser beam power in an optical recording system |
US6636468B2 (en) | 2001-03-26 | 2003-10-21 | Oak Technology, Inc. | Method and apparatus for laser power control during recording |
US20030227844A1 (en) * | 2002-06-07 | 2003-12-11 | Media Tek Inc. | Optical recording system with optimal recording laser beam power control, and method and device for generating a mark formation effectiveness signal in an optical recording system |
US6690633B2 (en) * | 1999-12-17 | 2004-02-10 | Lg Electronics Inc. | Method and apparatus for controlling optimal writing power for an optical recording medium |
US6697308B1 (en) | 2000-04-28 | 2004-02-24 | Mosel Vitelic Corporation | Method and system for providing timing adjustment to perform reliable optical recording at high speeds |
US20040114472A1 (en) * | 2002-09-12 | 2004-06-17 | Che-Chieh Wang | Power control method of a pick-up head of an optical disk drive |
US6775216B2 (en) | 2000-08-29 | 2004-08-10 | Zoran Corporation | Method and apparatus for restarting a write operation in a disk drive system |
US6813107B1 (en) * | 1999-04-13 | 2004-11-02 | Lg Electronics Inc. | Apparatus and method for detecting an optimal writing power |
US20050025018A1 (en) * | 2003-07-28 | 2005-02-03 | Han-Wen Hsu | Apparatus and method for automatic power control |
US20050134370A1 (en) * | 2003-12-22 | 2005-06-23 | Kelly Christopher P. | Method of self-calibration of pulse rise and fall times |
US20050213450A1 (en) * | 2004-03-05 | 2005-09-29 | Yamaha Corporation | Optical disk recording apparatus and program |
US20060044974A1 (en) * | 2004-08-10 | 2006-03-02 | Shinano Kenshi Kabushiki Kaisha | Optical disc apparatus |
US20060114759A1 (en) * | 2004-11-30 | 2006-06-01 | Hanks D M | Labeling methods and apparatus using energy of two wavelengths |
CN1303593C (en) * | 2003-01-28 | 2007-03-07 | 日立乐金资料储存股份有限公司 | Optical disk recording device and recording method |
KR100694023B1 (en) | 1999-09-09 | 2007-03-12 | 삼성전자주식회사 | Method of compensating for defocus/tilt and apparatus therefor |
US20070222418A1 (en) * | 2004-06-14 | 2007-09-27 | Commissariat A L'energie Atomique | Method for Managing a Pool or Rechargeable Batteries |
US20080101174A1 (en) * | 2006-10-27 | 2008-05-01 | Hon Hai Precision Industry Co., Ltd. | Optimal power calibration method and data recording apparatus using the same |
US20080159094A1 (en) * | 2006-12-28 | 2008-07-03 | Hon Hai Precision Industry Co., Ltd. | Disc drive and method for determining write parameters |
US10056106B1 (en) * | 2017-05-09 | 2018-08-21 | Avago Technologies General Ip (Singapore) Pte. Ltd. | Methods and devices for power control of a light source of a memory system |
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Cited By (79)
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---|---|---|---|---|
US5625616A (en) * | 1995-04-05 | 1997-04-29 | Sony Corporation | Deterioration estimating method for a light emitting device and a light emission driving apparatus using the method |
US5646919A (en) * | 1996-01-16 | 1997-07-08 | Eastman Kodak Company | Dynamic tracking control in an optical recording system by sensing mark formation |
US5675568A (en) * | 1996-01-16 | 1997-10-07 | Eastman Kodak Company | Laser power control in an optical recording system to compensate for variations in mark length resulting from a wobbled groove |
US5726965A (en) * | 1996-02-29 | 1998-03-10 | Eastman Kodak Company | Intersymbol interference detection in an optical recording system using a reflected write signal |
US5640381A (en) * | 1996-03-08 | 1997-06-17 | International Business Machines Corporation | Laser power-drive circuit having a scaling DAC supplying a scaled reference signal to a plurality of scaled DAC's that supply a plurality of scaled output signals |
US5742046A (en) * | 1996-10-18 | 1998-04-21 | Eastman Kodak Company | Amplifier circuit for providing outputs as a function of sensed light |
US5903537A (en) * | 1997-04-07 | 1999-05-11 | Eastman Kodak Company | Direct read during mark formation for laser power correction |
US6407976B2 (en) | 1997-04-11 | 2002-06-18 | Sony Coproration | Method for controlling laser light power, method for data recording into optical disc, and optical disc recording apparatus |
US5856964A (en) * | 1997-04-15 | 1999-01-05 | Eastman Kodak Company | Multihead optical disc drives with direct reading after writing operation |
US5978334A (en) * | 1997-10-24 | 1999-11-02 | Eastman Kodak Company | Sampling timing for a reflected write signal |
US6088308A (en) * | 1998-02-13 | 2000-07-11 | International Business Machines Corporation | System for creating, reading and writing on rotatable information storage media, a tracking circuit for providing positioning information |
US6108282A (en) * | 1998-02-13 | 2000-08-22 | International Business Machines Corporation | System for creating, reading and writing on rotatable information storage media, an apparatus for multilayer laser source positioning |
US6049512A (en) * | 1998-02-13 | 2000-04-11 | International Business Machines Corporation | In a system for creating, reading and writing on rotatable information storage media, an apparatus for two-sided writing |
US6088306A (en) * | 1998-02-13 | 2000-07-11 | International Business Machines Corporation | System for creating, reading and writing on rotatable information storage media, an apparatus for combined writing and reading operations |
US6088309A (en) * | 1998-02-13 | 2000-07-11 | International Business Machines Corporation | System for creating, reading and writing on rotatable information storage media, a method for controlling vertical laser alignment |
US6097681A (en) * | 1998-02-13 | 2000-08-01 | International Business Machines Corporation | System for creating, reading and writing on rotatable information storage media, an apparatus for determining angular position, θ |
US6097677A (en) * | 1998-02-13 | 2000-08-01 | International Business Machines Corporation | System for creating, reading and writing on rotatable information storage media, a method for combined writing and reading operations |
US6081487A (en) * | 1998-02-13 | 2000-06-27 | International Business Machines Corporation | System for creating, reading and writing on rotatable information storage media, an apparatus for controlling laser positioning |
US6111830A (en) * | 1998-02-13 | 2000-08-29 | International Business Machines Corporation | System for creating, reading and writing on rotatable information storage media, an apparatus for determining linear and/or angular velocity |
US6118740A (en) * | 1998-02-13 | 2000-09-12 | International Business Machines Corporation | System for creating, reading and writing on rotatable information storage media, a method for writing closely spaced information tracks |
US6128262A (en) * | 1998-02-13 | 2000-10-03 | International Business Machines Corporation | System for creating, reading and writing on rotatable information storage media, a method for customizing said media with timing information |
US6222813B1 (en) | 1998-02-13 | 2001-04-24 | International Business Machines Corporation | System for creating, reading and writing on rotatable information storage media, an apparatus for controlling vertical laser alignment |
US6232045B1 (en) | 1998-02-13 | 2001-05-15 | International Business Machines Corporation | System for creating, reading and writing on rotatable information storage media, a method for producing a recording blank |
US6046970A (en) * | 1998-02-13 | 2000-04-04 | International Business Machines Corporation | System for creating, reading and writing on rotatable storage media, an apparatus for determining laser aging characteristics |
US6285639B1 (en) * | 1998-04-29 | 2001-09-04 | Sony Corporation | On-the-fly of jitter during optical disc mastering/recording |
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US7969839B2 (en) | 1999-04-13 | 2011-06-28 | Lg Electronics Inc. | Apparatus and method for detecting an optimal writing power |
US20080068737A1 (en) * | 1999-04-13 | 2008-03-20 | Lee Jeong Y | Apparatus and method for detecting an optimal writing power |
US20050041549A1 (en) * | 1999-04-13 | 2005-02-24 | Lg Electronics Inc. | Apparatus and method for detecting an optimal writing power |
US6813107B1 (en) * | 1999-04-13 | 2004-11-02 | Lg Electronics Inc. | Apparatus and method for detecting an optimal writing power |
US7952970B2 (en) | 1999-04-13 | 2011-05-31 | Lg Electronics Inc. | Apparatus and method for detecting an optimal writing power |
KR100694023B1 (en) | 1999-09-09 | 2007-03-12 | 삼성전자주식회사 | Method of compensating for defocus/tilt and apparatus therefor |
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